Apparatus for the production of vibrations.



PATBNTED NOV. 5, 1907.- J. ASTROM. APPARATUS FOR THE raonucnou 0F VIBRATIONS;

APPLICATION TILED FEB. 2, 1905. BBEBW'ED JAN. 21, 1907.

UNITED STA'ilibL A ENT OFFICE.

JOHN ASTROM, OF MILWAUKEE, WISCONSIN.

APPARATUS FOR'THE PRODUCTION OF VIBRATIONS.

' declare that the following is a full, clear, and exact desame height, and below said upper end the scription thereof.

My invention has reference to apparatus designed to produce vibrations, caused by the interrupted current of a fluid under pressure passing therethrough and is particularly designed to create sound, and it consists in certain peculiarities of construction and combination of parts, as will be hereinafter fully described, in connection with the accompanying'drawings and subsequently claimed. v

In the said drawings: Figure 1 is a sectional elevation of one form of a device embodying my said invention,

' the plane of the section being indicated by line A-A of Figs 2. Fig. 2, is a horizontal sectional view thereof, taken on the plane indicated by the line BB of Fig. 1.

Referring by numerals to said drawings, 1 represents an outer vessel and 2 an inner vessel, connected together at the base 3, and arranged concentrically one within the other said vessels being open at the top, and there being, drawings, a pipe or passage-way 4, leading into the space 5 between the inner surface of the outer vessel 1 and the outer surface of the inner vessel 2, the said vessels being. herein illustrated as cylindrical in form, and the said space 5 being therefore annular, though this is not material, the said pipe 4 entering said space 5 at the lower end thereof. also a pipe or passage-way 6 leading from the base 3, and open to central-space 7, within the inner vessel 2, but of less diameter than the said vessel. The upper ends of the said vessels 1 and 2 rise to practically the vessel 1 is formed with an exterior screw-threaded flange 8.

Over the upper ends of the vessels 1 and 2 there is superimposed a diaphragm 9 of suitable material and elasticity, which diaphragm is held taut against the -upper edge of the vessel 1 by means of a countersunk cap 10 having an exteriorly screw-threaded rim 11 engaging the flange aforesaid. In the'operation of my device, as indicated by the arrows, the pipe or passage-way 4 is to be regarded as the inlet for the fluid employed, and the pipe gr passageway 6 as the outlet therefor, although this may be reversed, as hereinafter explained, and the fluid em ployed may be gaseous fluid such as air or steam, or it may be liquid such as water, as preferred in any given case,

but in the present illustration let it be assumed that a gaseous fluid is employed entering through pipe or passage-way 4, and discharging at 6, as stated.- The dia-,

phragm 9 which is clamped to the upper edge of the in the arrangement shown in the said In this arrangement there is Patented Nov. 5, 1907. Renewed January 21 1907. Serial No. 353.355.

outer vessel 1, rests loosely on the u'pperedge of the inner vessel 2, and by means of this diaphragm the interior of the described apparatus is shut off from all com munication with tlie surrounding medium, otherwise than through the passage-Way 6. The space 5 between the vesesls 1 and 2 ,and the space 7 inside of the vessel 2, are separated from each other when the diaphragm 9 is in contact with the upper edge of the vessel 2, and have a communication when the said diaphragm is lifted from such contact, as hereinafter described. If the fluid or gaseous substance is forced into the space 5, through the pipe or passage-way 4 under pressure, the diaphragm 9 will be thereby forced away from contact with the upper edge of the vessel 2 (or if not in absolute contact, the opening between the diaphragm and the inner vessel edge will be increased) and the fluid will escape into the central space 7, Where it will flow in the direction of the arrows, and pass out through the pipe or passage-way 6. In so doing, if the-liquid is gaseous, it will expand in the space 7 and have increase of velocity through the outlet 6, thus creating a vacuum, or partial vacuum, in said space 7, the result of which is that the diaphragm 9 will draw back to, or towards, the upper edge of the vessel 2, (this being aided by the simultaneous slight momentary reduction of pressure in the upper end of the space 5, occasioned by the inflow of the fluid into the space 7,) and thereby the flow of more of the fluid from the space 5 into the space 7 is arrested or decreased, until the pressure in the space 5 has again increased enough to move the diaphragm 9 away from the upper edge of the vessel 2, when the above described action will be repeated. If the fluid forced into the space 5, through the inlet 4, is a liquid such as Water, the inertia due to the speed with which said liquid traverses the said space 7 towards the outlet 6, will in the same manner, createa total or partial vacuum in said space 7,

and allow the diaphragm 9 to be drawn against or towards the upper edge of the vessel 2, as before described. It will thus be observed that the said diaphragm 9 will be maintained in a continuous vibration so long as a con tinuous supply of the fluid employed is being forced into the apparatus through the inlet 4 and allowed to escape therefrom through the space 7 and outlet 6 which vibration is transmitted to the medium surrounding the apparatus; As hcreinbefore stated, the part 6 can 'be arranged to serve as the inlet, and the apparatus made to V discharge through the part 4, the difference of pressure in either instance within the parts 4 and 6 being the cause of the vibrations of the diaphragm 9, and the consequent variable pressure inthe spaces 5 and 7,1esulting in the production of sound, the volume and height of which depend both upon the pressure employed, and

upon the general and detailldesign of the apparatus. In

the operation of my device it is immaterial whether the medium which surrounds the same is gaseous or liquid, as for example, either air or water, or partly one form of fluid and partly the other, and hence the said operation is independent of location or environment, or the par;

ticular nature of the fluid under pressureemployed.

While, as stated, my'device is particularly intendedtion arfd transmission of vibrations is essential.

I claim? I An apparatus comprising a pair of vessels openat one end, and arranged 'one Within'the other, one vessel having an inlet and the otheran outlet, which communicate, one with the space between the two vessels, and the other 'with the space inside the inner vessel; in combination with n movable closure for theopen ends of said vessels, whereby the said device may be-put into vibration by the passage therethrough of an interrupted current of fluid under pressure. p I

2. In an apparatus forthe production of vibrations, the combination with two vessels, arranged one within the othe'rwith aspace within the inner vessel, and another space between the two vessels, the latterbeingr open at one end and one of said vessels having an inlet for the admission of fluid .under pressure,-and the other an outlet for saldfluid, of a movable closure for the open ends 01 said vessels, said closure being adapted to be moved 'by said fiuid..to enable the fluid to flow from .one to the other of said spaces, and then to beinstantly closed, the I difference in pressure betweenl'the inlet'andfoutlet causing the said vibrations in the operation'of the device; 1

3.- An apparatus for the production of vibrations, consisting of two vessels arranged one within the other, and

open atone end, the saidvessels there terminatingoo practically the same plane, and one vessel having an inlet and the other an outlet, in"c0mbination witha movable diaphragm secured against the open end edge of, theouter vessel and resting loosely against the corresponding edge of, the inner vessel, the said inletbeing for, the admission of fluid under pressure.

In testimony that -'I claim the foregoing I have hereunto set m hand at Milwaukee in thecounty of Milwaukee and State of -Wisconsin in the presence of two witnesses.

JOHN 'ASTROM.

Witnesses: I

-H. G. UN nEnwoop,

GEORGE FELBER.- 

